I've seen both of these on skylake with kernel 5.4.2, and the GPU hang
has reports of kabylake also affected. I imagine those are pretty
Both bug reports include upstream reference.
WARNING: CPU: 2 PID: 1 at kernel/trace/trace.c:8106
[drm:gen8_reset_engines [i915]] *ERROR* rcs0 reset request timed out
The second is pretty bad in that it appears as a total lockup,
locally. Usually I've been able to ssh into the system, but I'd guess
most users will just force a power off and start over.